Desktop USB3

Fit a desktop-sized (3.5") hard drive into one of these cases, and connect to an external USB3 port.


USB 3.0
A new major feature is the "SuperSpeed" bus, which provides a fourth transfer mode at 4.8 Gbit/s. The raw throughput is 4 Gbit/s, and the specification considers it reasonable to achieve 3.2 Gbit/s (0.4 GByte/s or 400 MByte/s), or more, after protocol overhead.
When operating in SuperSpeed mode, full-duplex signaling occurs over two differential pairs separate from the non-SuperSpeed differential pair. This results in USB 3.0 cables containing two wires for power and ground, two wires for non-SuperSpeed data, and four wires for SuperSpeed data, and a shield that was not required in previous specifications.
To accommodate the additional pins for SuperSpeed mode, the physical form factors for USB 3.0 plugs and receptacles have been modified from those used in previous versions. Standard-A cables have extended heads where the SuperSpeed connectors extend beyond and slightly above the legacy connectors. Similarly, the Standard-A receptacle is deeper to accept these new connectors. On the other end, the SuperSpeed Standard-B connectors are placed on top of the existing form factor. A legacy standard A-to-B cable will work as designed and will never contact any of the SuperSpeed connectors, ensuring backward compatibility. SuperSpeed standard A plugs will fit legacy A receptacles, but SuperSpeed standard B plugs will not fit into legacy standard B receptacles, so a new cable can be used to connect a new device to an old host, but not to connect a new host to an old device; for that, a legacy standard A-to-B cable will be required.

This article is licensed under the GNU Free Documentation License. It uses material from the following Wiki article(s) :
* Universal_Serial_Bus

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